Sparse Representation Shape Models

Sparse Representation Shape Models
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稀疏表示形状模型

DOI:
10.1007/s10851-012-0394-3
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发表时间:
2010-12
影响因子:
2
通讯作者:
Jigang Wu
Jigang Wu
中科院分区:
数学4区
文献类型:
--
作者:
Yuelong Li;Jufu Feng;Li Meng;Jigang Wu

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众所周知,在形状提取过程中,加入合适的形状约束模型可以有效地提高定位精度。介绍了一种新的可变形形状模型-稀疏表示形状模型(SRSM)。我们的模型不是遵循通常使用的统计形状约束,而是基于形态结构、对齐训练样本的凸船体,即,只有可以由系数之和等于1的对齐训练样本线性表示的形状才被定义为合格的。该限制严格控制形状变形模式,以减少提取错误并防止极差的输出。该模型基于稀疏表示实现,保证了在形状正则化过程中最大限度地保留有价值的形状信息。此外,SRSM是可解释的,因此有助于进一步理解应用,如人脸姿态识别。SRSM的有效性进行了验证两个公开可用的人脸图像数据集,FGNET和FERET。
It is well-known that, during shape extraction, enrolling an appropriate shape constraint model could effectively improve locating accuracy. In this paper, a novel deformable shape model, Sparse Representation Shape Models (SRSM), is introduced. Rather than following commonly utilized statistical shape constraints, our model constrains shape appearance based on a morphological structure, the convex hull of aligned training samples, i.e., only shapes that could be linearly represented by aligned training samples with the sum of coefficients equal to one, are defined as qualified. This restriction strictly controls shape deformation modes to reduce extraction errors and prevent extremely poor outputs. This model is realized based on sparse representation, which ensures during shape regularization the maximum valuable shape information could be reserved. Besides, SRSM is interpretable and hence helpful to further understanding applications, such as face pose recognition. The effectiveness of SRSM is verified on two publicly available face image datasets, the FGNET and the FERET.
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发表时间: 2010-10
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